As a native of Litchi chinensis, China is abundant in germplasm resources in the tropical and south sub-tropical zone. In Hainan province, Some big wild litchi trees and batches of wild litchi have been found in the tropical origenate forestry of Bawang, Wuzhi, Jianfeng, Diaoluo, and Jingu Mountains. In addition, there are 4,000hm2 of litchi seedlings scattered on Hainan island. They comprise a huge gene pool of litchi's germplasm resources,Which is both bases of seedling selection at present and...